Verify rule functionality. Stop one node and check that Zookeeper dead node and Zookeeper dead nodes list rule opens (allow up to two minutes). Open the Alerts menu and select Open Alerts to view all open rules.

To check Zookeeper cluster not serving requests rule stop more than 50% of all active nodes (in this case two of three, if Zookeeper quorum is default).

To check Zookeeper dead cluster stop all nodes.

To check Zookeeper cluster high latency send large latency values from the Data > Data Entry page. For example: